To Do:

Weapons Master

Everything: Pretty much the same as regular Weapons Masters. Also, pretty much every feat is assumed to be illegal for official matches unless overruled by your GM or otherwise specified.

Disclaimer

The only thing that will be changed are the feats, to make it accessible to use with non-standard weapons. This is only to be used as a template for GMs to tinker with to fit their campaign. It is viable as an option to pick by itself, though.

Base Feats

Master's Expertise

Static
You may use your STR modifier instead of CON, DEX, INT, WIS, or CHA when rolling damage for an arms attack. Your Accuracy Check for your Weapon(s) of Choice is lowered by your STR modifier divided by four.

Weapon of Choice

Static
Pick a specific weapon or a weapon category, depending on your campaign. You can perform stunts with that weapon without making checks. Attacks with your Weapon of Choice do half your STR modifier additional damage. This stacks with Combat Focus. You may take Weapon of Choice multiple times, choosing another weapon or weapon category each time.

Weapon Expert

Prerequisites: Weapons Master, 22 STR
Static
You automatically get any and all campaign feats related to your Weapons of Choice as soon as you meet the prerequisites. If any of the requirements require any stat other than STR, change those requirements to STR. Your Weapon of Choice damage bonus is increased to your STR modifier for the chosen Weapon of Choice. You can identify all weapons similar to your Weapons of Choice, knowing any special features, damages, etc., without a check.

Auto-Parry

Prerequisites: Weapons Master, 23 STR
Static - Legal for Use in Official Battles if Needed
You gain 2 to your evasion for the purposes of dodging arms attacks and moves with “Blade”, “Cut”, “Hammer”, “Kick”, “Slash”, or “Punch” in their names.

Auto-Counter

Prerequisites: Weapons Master, Auto-Parry
Daily - Every 10 levels gained, you may perform this Feature another time per day. - Free Action
If an attack misses you where it otherwise would not have missed without the Auto-Parry feature, you may immediately launch a counter attack with the weapon you are wielding, as a standard Arms attack. You may not use any non-Static feature to change the properties of this attack.

Example

A has both Auto-Parry and Auto-Counter, and a DEX evasion of 2. If B attacks A with a parry-able attack with an AC of 6, 1-7 would miss. 8-9 would fall under it being parried, and thus, may be countered.

Gash

Prerequisites: Weapons Master, 3 Weapons Master features
Daily - Every 12 levels gained, you may perform this Feature another time per day. - Trainer Action
When you declare use of this feature, make an Arms attack with a Weapon of Choice. You forfeit your Weapon of Choice damage bonus for this attack. This attack is a Critical Hit on a roll of 17 or higher during Accuracy Check.

Kiai Focus

Master of Armor

Prerequisites: Weapons Master, Any armor
Static - Legal for Use in Official Battles if Needed
You may use any armor as if no other feats were required for it. If the armor you are wearing hinders anything, that hindrance is lowered by half your STR mod.

Armor Expert

Prerequisites: Weapons Master, Master of Armor
Static - Legal for Use in Official Battles if Needed
The bonuses supplied by your armor is increased to 1.5x its original bonus. This does not include damage reduction feats such as Martial Artist's Tough Skin and Spec Ops's Improved/Perfect Armor. You can easily identify all armor, knowing any special features, defenses, etc., without a check.

Passing Blade

Prerequisites: Weapons Master
Daily - Every 8 levels, you may perform this Feature another time per day - Free Action
When you attack with your Weapon of Choice as a trainer attack or when using Gash, you may grant your attack the Pass keyword. If you are wielding a Ranged weapon, it instead gains the Beam keyword with a maximum distance of 15 meters.

Piercing Shot

Prerequisites: Weapons Master, 21 STR, Weapon of Choice with a Ranged weapon
Daily - Every 10 levels, you may perform this Feature another time per day. - Free Action
You must be wielding a ranged weapon to use this Feature. When you roll 17-20 on Gash or a trainer attack, you may choose to reduce the target’s defense and special defense combat stages by 1.

Quake Hammer

Prerequisites: Weapons Master, 24 STR, 5 Weapons Master Features, Weapon of Choice with a Melee weapon
Daily - Trainer Action
You must be wielding a melee weapon to use this Feature. Use the Move Earthquake. This attack may not hit flying types or pokemon with Levitate, even if its element is changed by Sword of Sun and Moon. Use your STR modifier as your ATK stat.

Sword of Sun and Moon

Prerequisites: Weapons Master, 21 STR, 4 Weapons Master Features, Gash
Static
When you take this feature, select an Elemental Arms Modifier. You now possess that modifier feature. This feature does not count towards the standard limit of one-per-trainer. You may use Arms Feature Modifiers to change the element of Gash or Quake Hammer.

Weapons Dance

Replacement Feats

The following feats only replace Master of Armor and Armor Expert in campaigns without homebrewed armor. Only replace those feats if and only if there is no homebrewed armor in your campaign.

Master's Aegis

Prerequisites: Weapons Master, Shield (1250)
Static
You wield a shield into battle, gaining 5 points of damage reduction. You may substitute the shield requirement with any other defensive weapon within reason, but you must still pay the cost of this Feature when you take it.

Pierce

So You Want A Redux

Only do this if there is no homebrew weapons or armor in your campaign. Make the following edits:

Weapon of Choice: Replace "Pick a specific weapon or a weapon category, depending on your campaign." with "Pick an Arms category."

Weapon Expert: Replace "You automatically get any and all campaign feats related to your Weapons of Choice as soon as you meet the prerequisites." with "You automatically get any and all Arms feats related to your Weapons of Choice as soon as you meet the prerequisites." Remove "You can identify all weapons similar to your Weapons of Choice, knowing any special features, damages, etc., without a check."